The RenderMan Interface - Paul Bourke

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LightSource ”spotlight” 2 ”coneangle” [5] LightSource ”ambientlight” 3 ”lightcolor” [.5 0 0] ”intensity” [.6] SEE ALSO RiAreaLightSource, RiIlluminate, RiFrameEnd, RiWorldEnd RtLightHandle RiAreaLightSource ( RtToken shadername, ...parameterlist...) shadername is the name of a light source shader. This procedure creates an area light and makes it the current area light source. Each subsequent geometric primitive is added to the list of surfaces that define the area light. RiAttributeEnd ends the assembly of the area light source. The light is also turned on and added to the current light source list. An RtLightHandle value is returned which can be used to turn the light off or on again. If the Area Light Source capability is not supported by a particular implementation, this subroutine is equivalent to RiLightSource. RIB BINDING AreaLightSource name sequencenumber ...parameterlist... The sequencenumber is a unique light identification number which is provided by the RIB client to the RIB server. Both client and server maintain independent mappings between the sequencenumber and their corresponding RtLightHandles. The number must be in the range 0 to 65535. EXAMPLE RtFloat decay = .5, intensity = .6; RtColor color = {.5,0,0}; RiAreaLightSource ( ”finite”, ”decayexponent”, (RtPointer)&decay, ”lightcolor”, (RtPointer)color, ”intensity”, (RtPointer)&intensity, RI NULL); SEE ALSO RiFrameEnd, RiLightSource, RiIlluminate, RiWorldEnd RiIlluminate ( RtLightHandle light, RtBoolean onoff ) If onoff is RI TRUE and the light source referred to by the RtLightHandle is not currently in the current light source list, add it to the list. If onoff is RI FALSE and the light source referred to by the RtLightHandle is currently in the current light source list, remove it from the list. Note that popping the graphics state restores the onoff value of all lights to their previous values. RIB BINDING Illuminate sequencenumber onoff 43
The sequencenumber is the integer light handle defined in a LightSource or AreaLightSource request. EXAMPLE LightSource ”main” 3 Illuminate 3 0 SEE ALSO RiAttributeEnd, RiAreaLightSource, RiLightSource 4.2.4 Surface shading The graphics state maintains a current surface shader. The current surface shader is used to specify the surface properties of subsequent geometric primitives. Initially the current surface shader is set to an implementation-dependent default surface shader (but not ”null”). The RenderMan Interface includes six standard types of surfaces: ”constant”, ”matte”, ”metal”, ”shinymetal”, ”plastic”, and ”paintedplastic”. The definitions of these surface shading procedures are given in Appendix A, Standard RenderMan Interface Shaders. The parameters controlling these surfaces are given in Table 4.8, Standard Surface Shader Parameters. RiSurface ( RtToken shadername, ...parameterlist...) shadername is the name of a surface shader. This procedure sets the current surface shader to be shadername. If the surface shader shadername is not defined, some implementation-dependent default surface shader (but not ”null”) is used. RIB BINDING Surface shadername ...parameterlist... EXAMPLE RtFloat rough = 0.3, kd = 1.0, width = 0.25; RiSurface (”wood”, ”roughness”, (RtPointer)&rough, ”Kd”, (RtPointer)&kd, ”float ringwidth”, &width, RI NULL); SEE ALSO RiAtmosphere, RiDisplacement 44
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The RenderMan Interface Version 3.2
Page 3 and 4: TABLE OF CONTENTS List of Figures L
Page 5 and 6: 12.1 Surface Shaders . . . . . . .
Page 7 and 8: Section I DIFFERENCES BETWEEN VERSI
Page 9 and 10: LIST OF TABLES 4.1 Camera Options .
Page 11 and 12: PREFACE This document is version 3.
Page 13 and 14: Section 1 INTRODUCTION The RenderMa
Page 15 and 16: created using this language. This l
Page 17 and 18: Depth of Field The ability to simul
Page 19 and 20: typedef RtPointer typedef RtPointer
Page 21 and 22: RiContext (ctx1); ... There is no R
Page 23 and 24: Section 3 RELATIONSHIP TO THE RENDE
Page 25 and 26: through the interface. Any place wh
Page 27 and 28: RtContextHandle RiGetContext ( void
Page 29 and 30: RiWorldBegin (); ... RiColor (...);
Page 31 and 32: Camera Option Type Default Descript
Page 33 and 34: ottom top left right Screen Window
Page 35 and 36: EXAMPLE RiFrameAspectRatio (4.0/3.0
Page 37 and 38: not support the special projection
Page 39 and 40: This procedure sets the times at wh
Page 41 and 42: Output depth values are the camera-
Page 43 and 44: A particular renderer implementatio
Page 45 and 46: Renderers may additionally produce
Page 47 and 48: The number of color components, n,
Page 49 and 50: RiAttributeBegin () RiAttributeEnd
Page 51 and 52: RIB BINDING Color c0 c1... cn Color
Page 53: An area light source is defined by
Page 57 and 58: 4.2.5 Displacement shading The grap
Page 59 and 60: SEE ALSO RiExterior RiAtmosphere Ri
Page 61 and 62: Matte onoff EXAMPLE RiMatte (RI TRU
Page 63 and 64: object foo2 will be drawn when the
Page 65 and 66: the exterior is the region adjacent
Page 67 and 68: RiIdentity ( ); SEE ALSO RiTransfor
Page 69 and 70: RiScale ( RtFloat sx, RtFloat sy, R
Page 71 and 72: 4.3.2 Transformation stack Transfor
Page 73 and 74: Section 5 GEOMETRIC PRIMITIVES The
Page 75 and 76: Information Name Type Class Floats
Page 77 and 78: No checking is done by the RenderMa
Page 79 and 80: 5.2 Patches Patches can be either u
Page 81 and 82: U V 0 1 2 3 12 13 14 15 4 5 6 7 8 9
Page 83 and 84: 10 x 7 Aperiodic Bezier Bicubic Pat
Page 85 and 86: SEE ALSO 2 2 [ 0 0 1 1 ] 0 1 ”Pw
Page 87 and 88: parameterlist is a list of token-ar
Page 89 and 90: Requests a sphere defined by the fo
Page 91 and 92: Hyperboloid 0 0 0 .5 0 0 270 ”Cs
Page 93 and 94: z N z V point2 height U x x y 0 max
Page 95 and 96: particle. If a primitive variable i
Page 97 and 98: The code array is a sequence of mac
Page 99 and 100: is an array of floats that define t
Page 101 and 102: The helper program generates geomet
Page 103 and 104: Procedural ”DynamicLoad” [ ”m
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SolidBegin ( ”difference” ); So
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Section 6 MOTION Some rendering pro
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Transformations Geometry Shading Ri
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channels (usually an RGB color) can
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Image Forward Axis Up Axis Right Ax
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ErrorHandler ”ignore” ErrorHand
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Part II The RenderMan Shading Langu
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spaces (such as CMYK or pseudocolor
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transmit reflect transmit P E light
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Section 10 RELATIONSHIP TO THE REND
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Section 11 TYPES The Shading Langua
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Coordinate System ”shader” ”c
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As in C, individual array elements
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Light Source E Vantage Point N L Il
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Surface Element to Illuminate L N I
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Name Type Storage Class Description
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• conditional execution, • loop
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This example integrates over a hemi
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Shader instance variable values can
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} return 2 * (vector noise(p)) - 1;
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These functions compute power and i
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The actual change in a variable is
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Return a unit vector in the directi
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Return surface normal given a point
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diffuse returns the diffuse compone
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prevent aliasing. If one set of tex
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15.7.3 Shadow depth maps Shadow dep
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These functions access the value of
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The standard data names supported b
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} Oi = sum; Ci = Cs * Oi * (Ka + Kd
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path of the ray. The input Ci and O
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A.2.3 Metal surface surface metal(
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distantlight( float intensity = 1;
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A.6 Imager Shaders A.6.1 Background
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variable definitions ; variables va
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triple sixteentuple arrayindex: [ e
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Logical expressions have the value
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typedef RtPointer RtContextHandle;
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RiOptionV(RtToken name, RtInt n, Rt
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RtInt n, RtToken tokens[], RtPointe
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#define RIE_NOTATTRIBS ((RtInt)26)
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Comments Any occurrence of the ’#
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In the following sections the synta
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C.2.2 Error handling There are two
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adhandle badparamlist badripcode ba
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v e r s i o n 212 # version 003 007
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Using RIB File structuring conventi
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Attribute Format PixelFilter Shadin
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##Include filename This entry allow
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D.2.1 RIB Entity File example ##Ren
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Motion Blur Programmable Shading Di
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} E.4 Gaussian Filter RtFloat RiGau
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Appendix G RENDERMAN INTERFACE QUIC
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Function RiOpacity (color) RiOption
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Geometric Primitives (continued) Fu
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Function abs(x) Math Functions Desc
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Function area(P) calculatenormal(P)
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Texture Mapping Functions Function
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RiInterior 47 RiLightSource 42 RiMa
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and uniform variables on an RiNuPat
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Statement About Pixar’s Copyright
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The RenderMan Interface - Paul Bourke

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